M-Series® M2000 Electromagnetic Flow Meter Detector DESCRIPTION The Badger Meter M-Series® model M2000 detector is the result of years of research and field use of electromagnetic flow meter technology. Based on Faraday’s law of induction, these meters can measure almost any liquid, slurry, or paste that has minimum electrical conductivity. Designed, developed, and manufactured under strict quality standards, the M-Series meter features sophisticated, processor-based signal conversion with accuracies of ±0.25 percent. The wide selection of liner and electrode materials helps ensure maximum compatibility and minimum maintenance over a long operating period. M2000 Detector OPERATION The flow meter is a stainless steel tube lined with a non-conductive material. Outside the tube, two DC powered electromagnetic coils are positioned opposing each other. Perpendicular to these coils, two electrodes are inserted into the flow tube. Energized coils create a magnetic field across the whole diameter of the pipe. As a conductive fluid flows through the magnetic field, a voltage is induced across the electrodes. This voltage is proportional to the average flow velocity of the fluid and is measured by the two electrodes. This induced voltage is then amplified and processed digitally by the converter to produce an accurate analog or digital signal. The signal can then be used to indicate flow rate and totalization or to communicate to remote sensors and controllers. With no moving parts in the flow stream, there is no pressure lost. Also, accuracy is not affected by temperature, pressure, viscosity, density or flow profile. There is practically no maintenance required. APPLICATION The M2000 has many advantages over other conventional technologies. It can be used in a majority of industrial flow applications. The M2000 meter can accurately measure fluid flow—whether the fluid is water or a highly corrosive liquid, very viscous, contains a moderate amount of solids, or requires special handling. Today, magnetic meters are successfully used in industries including food and beverage, pharmaceutical, water and wastewater, and chemical. ELECTRODES When looking from the end of the meter into the inside bore, the two measuring electrodes are positioned at three o’clock and nine o’clock. M2000 mag meters have an “empty pipe detection” feature. This is accomplished with a third electrode positioned in the meter between twelve o’clock and one o’clock. ITB-186-03-EN (September 2012) If this electrode is not covered by fluid for a minimum five-second duration, the meter will display an “empty pipe detection” condition, send out an error message if desired, and stop measuring to maintain accuracy. When the electrode again becomes covered with fluid, the error message will disappear and the meter will continue measuring. As an option to using grounding rings, a grounding electrode (fourth electrode) can be built into the meter during manufacturing to assure proper grounding. The position of this electrode is at five o’clock. FEATURES • Unaffected by most solids contained in fluids • Pulsed DC magnetic field for zero point stability • Corrosion resistant liners for long life • Calibrated in state-of-the art facilities • Optional grounding rings or grounding electrode • Measurement largely independent of flow profile • NSF listed • Integral and remote signal converter availability • Available in sizes 0.25…54" (6…1400 mm) Technical Brief